linux-kernel - [PATCH 0/2] drivers/cpufreq: gain accurate CPU frequency from cpufreq/scaling_cur

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Message-ID: <20230515100005.3540793-3-zengheng4@huawei.com>
Date:   Mon, 15 May 2023 18:00:05 +0800
From:   Zeng Heng <zengheng4@...wei.com>
To:     <lenb@...nel.org>, <viresh.kumar@...aro.org>, <rafael@...nel.org>
CC:     <weiyongjun1@...wei.com>, <linux-pm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <xiexiuqi@...wei.com>,
        <linux-acpi@...r.kernel.org>, <liwei391@...wei.com>,
        <wangxiongfeng2@...wei.com>
Subject: [PATCH 0/2] drivers/cpufreq: gain accurate CPU frequency from cpufreq/scaling_cur_freq

When users want to get frequency by scaling_cur_freq under cpufreq sysfs,
they often get the invalid result like:

$ cat /sys/devices/system/cpu/cpu6/cpufreq/scaling_cur_freq
4294967295

So this series provides fixes to the concerned issue.

Zeng Heng (2):
  cpufreq: CPPC: keep target core awake when reading its cpufreq rate
  acpi: CPPC: read delivered_reg and reference_reg in critical section

 drivers/acpi/cppc_acpi.c       |  4 ++++
 drivers/cpufreq/cppc_cpufreq.c | 30 ++++++++++++++++--------------
 2 files changed, 20 insertions(+), 14 deletions(-)

--
2.25.1